Physics of the Cosmos (PCOS) Strategic Technology Development ...

Physics of the Cosmos (PCOS) Strategic Technology Development ...

A Far-Infrared Heterodyne Array Receiver
for C+ and OI Mapping
PI: Dr. Imran Mehdi/JPL
Objectives and Key Challenges:
Heterodyne technology is necessary to answer fundamental
questions such as how do stars form? How do circumstellar disks
evolve and form planetary systems? What controls the massenergy-chemical cycles within galaxies?
We will develop a 16-pixel heterodyne receiver system to cover
both the C+ and the O+ lines.

Significance of Work:
Lack of solid-state sources in the THz range is perhaps the single
most important challenge towards implementing array receivers
Low power backend spectrometers
Multi-pixel receiver characterization and calibration protocols

1.9 THz diode

16-pixel 1.9 THz all solid-state LO source

Approach:

Recent Accomplishments:

Utilize JPL developed membrane diode process to construct
tunable sources in the 1.9-2.06 THz range
Utilize novel waveguide based active device power combining
schemes to enhance power at these frequencies
Design and build compact silicon micromachined based housing
for HEB mixer chips
Utilize CMOS technology for backends/synthesizer
Characterize and test multi-pixel receivers to validate stability
and field performance

System design (completed)

Key Collaborators:

Application:

Paul Goldsmith (Science Lead), Jon Kawamura, Jose Siles,
Choonsup Lee, Goutam Chattopadhyay (all JPL); Frank Chang
(UCLA), Sander Weinreb (Caltech)

Heterodyne array receivers for future suborbital and space
missions
Array receivers for CCAT submillimeter telescope

Current Funded Period of Performance:
Jan 2014-Dec 2016

Next Milestones:

4-pixel LO chain with 70-76 GHz amplifiers (Sept 2015)
4-pixel Mixer block (Sept 2015)
Back end spectrometer (Dec 2015)
16-pixel LO chain (May 2016)
16-pixel receiver (Dec 2016)

TRLin = 3

TRLcurrent = 4

TRLtarget = 5
1

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